Brake for automobiles



Nov. l, 1927. 1,647,119

H. W. ALDEN BRAKEv FOR AUT@MOBILESA A Filed Jan'. 2, 1925 2 sheets-snee: 1

fli4l.

lllliilll' ff r *fg 4 mil/1 9 Nov. l, 1,927.

H. w. ALBEN BRAKE FOR AUTOMOBILES 2 Sheets-Sheet 2 Filed Jan. 2,. 1925 /M/E/v Tof? f// ATTORNEYJ,

Patented Nov. 1, 1927. j

narran STATES PATENT OFFICE.

HERBERT WSALDEN, 4OIF DETROIT, MICHIGANQASSIGNOB T0 TH TIMKEN-DETROIT AXLE COMPANY, OF DETROIT, MICHIGAN, A. CORPORATION 0F OHIO.

BRAKE FOR AUTOMOBILES.

Application filed January 2, 1925. Serial No. 115.

My invention relates to brakes for automobiles and has for its principal object to provide for the equalization of the pressures of the actuating cam against the ends of the brake band orthe brake shoes. It consists principally in mounting the actuating cam on a floating support whose position is determined by the reaction pressures of the ends of the brake band or brake shoes. It also consists in the combinations and arrangements ot 'parts hereinafter described and claimed.

ln the accompanying drawing, which forms part of thisspecification and wherein like symbols refer to like parts wherever they occur,

F ig. l is a vertical sectional view of my brake on the line 1-1 of Fig. 3, `looking towardvthe right Iand showing parts of the axle construction;

Fig. 2 is an elevation of the brake and a vertical section of the axle along'the lme 2-2 of Fig. 3 looking to the left; f

.Fig 3 is a vertical longitudinal section of the brake, road wheel and axle on vthe line 3-3 of ldig. 2; and

Fig. 4 is an enlarged detail sectional view of the operating cam on the line l1- 4 of Fig. 3. #L Y The -accompanying drawing' illustrates my brake mounted onv the driving axle of 'an automobile. The axle illustrated comprises a hollow housing 1, a hollow liner2 inside of said housing. anda driving shaft 3 inside of said liner. The road wheel 4 is of common type and vmounted in any suitable way upon the axle. 7The drawing illustrates the road wheel mounted on the liner, with `roller-bearings of the tapered roller type interposed between them. A brake drum 6 is mounted on the wheel in. any suitable manner.

The brake spider or support 7 comprises a centrally bored hub 8 that fits over the liner 2 and a radially extending disk portion 9 provided with'radial strengthening ribs 10 integral therewith. This disk portion 9 is Secured yby bolts or rivets 11 that pass through said disk and through an annular reinforcing member 12 and anV annular fiange formed on the end ofthe axle housings 1, :is-indicated at 13. The outer portion of the disk 9 yis provided with diametrically opposite. bosses 14 that are bored parallel with the axis of the spider so as .t0 adapt them to receive pintles or pivot studs play to accommodate this Swingin 15 and 16y which are fixed therein.` The upper pintle `15 projects from its spider toward the road wheel and the projecting portion serves ,as a' guide for a bifurcated casting 17, which straddles said pintle and has the middle portion of the brake band 18 riveted or 'otherwise secured to it. By this ar rangement, the brake band is enabled to have a radial movement with relation to the brake drum.

The pintle 16 diagonally opposite said first mentioned pintle 15 projects at each-end beyond the brake spider and, fitted over the projectingv ends thereof, so as to oscillate thereon, are the bored ends 19 of a yokeshaped block 20, Whose body portion is bored parallel with the axis of the spider. Rotatably mounted in the bore of said swinging or oscillating block 20 is a shaft 21 whosey inner end is mounted in a bracket 22 supf ported by the housing 1 and is provided.

with a lever 23 provided with suitable connecting devices adapted for convenient manipulation by the driver of the automobile. At the'outer end of this shaft (by which is meant the end located between the brake spider and the road Wheel) is a cam or rock arm 24. This cam comprises an arm that projects radially in opposite directions from the axis of the shaft and has a concaverecess 25 in each side face thereof, said recesses being on opposite sides of the axis. In each recess is located one convex end of a spreader link 26 whose other end also is convex. and is mounted in a concave recess 27 formed therefor in the endof a casting or fitting 28 that is riveted or otherwise secured to an end of the brake band or brake shoe 18. Eachl of these end ttings .28 is provided with an inwardly projecting hookshaped portion 29 adapted to receive the end of a vcoil tension spring 30, whose function is to keep the brake hand normally contracted lclear of the brake drum.

As above stated, the swinging block 20 in which the cam actuating shaft 21 is mounted, is pivotally supported on the ends of the roo pintle 16 lixed in the brake spider 7. The

mounting of the shaft 21 gives it suicient movement. The urpose of enabling this shaft supporting b ock to swing is to enable the actuating-cam 24 to adapt itself yautomatically to the reaction pressures on the ends of rthe brake band. .The inner fork 19 ofthe set position; and while in this set position,

the adjustine screws 32 are set against the inner end ol ,the spring 3l, whereb when the cam 24 is released and thebrae band contracted clear of the drum, the cam will remain lin proper operative and adjusted position relative to the ends of the brake band. In case the reaction pressure of one end of the brake band tends to exceed the reaction pressure of the other end, the swinging block shifts the position of the cam and tends to equalize the pressures, this swingin action being made possible by'- the resiliency of the spring. In this way, both ends of the brake band are fully utilized tor frictional engagement with the drum.

Obviously, the device hereinbe'fore described admits of considerable variation without departing from my invention, which is characterized mainly by the ability of the actuatin cam to iioat and thereby automatically adpist itself to the reaction pressures of the ends ci the brake band, or brake shoe, brake hands and brake, shoes lbeing considered full equivalents in this connection.

What I claim is: 1. ln a vehicle comprising an axle member and a wheel mounted on said axle memher, a brake comprising a drum on said wheel, a spider on saidr axle member, a friction member anchored on said spider, a cam located between and operatively connected to the ends of said friction member, a shaft vfor actuating said cam, a support for said shaft pivotally mounted on said spider to yswing towards or from said ends respectively to equalize the pressures of the cam thereon,

and means for adjusting the position ofsaid cam between said ends, said means comprisiiig an arm extending transverseiy'from said shaft support and adjusting members for positioning said arm and thereby swinging said shaft suppmt` to desired position relative to said ends. p

' 2. ln a vehicle comprising an axle mem- 'oer and a wheel mounted on said axle memher, a brake comprising a drum on said wheel, a spider on said axle member, a brake band anchored on said spider, a cam located ,1, between and operatively connected to the ends of said hand, a shaft 'for actuating said cam, a support :tor said shaft -pivotally mounted on saidispider to swing towards or from the ends of said brake hand respectively 'to equalize the pressures oi the cam "thereon, and means for normally holding said shaft support in predetermined pos1- tion and restoringit to said position when displaced therefrom, said means being yieldable to rmit said shaft support to swing to equalize the pressures of the cam against the respective ends of said brake band.

3. In a vehicle comprising an axle memberand a wheel mounted on said axle member, a brake comprising a drum on said wheel, a spider on said axle member, a friction member anchored on sai-d spider, a cam located betweenv and operatively connected to 'the ends of said member, a shaft for actuating saidfcam, a support for said shaft pivotally, mounted on said spider to swing ltowards or from said ends respectively to equalize the pressures of the cam thereon, and means for adjusting the position of said cam between said ends, said means comprising ad'usting members movable towards and awa ron each other and a resilient armexten ing ransversely from said shaft support and between said adjusting members whereby said shaft support is justed in desired position.

4. In a vehicle comprising an axle member and a wheel mounted on sai-d axle member, a brake comprising a drum on said yieldably adwheel, a spider `on said axle member having ing from saidshaft support and between said' adjusting members.

'5. In a vehicle comprising. an axle' meluher and a Wheel mounted on said axle member, a brake v 'comprising a drum on said Wheel, a. spider on said axle member, 'abralze band anchored on said spider, a cam located between and operatively connected to the ends of said band, a shait for actuating said ...calma support for said shaft pivotally mounted von said spider to swin towards or from the ends of said brake han respectively to equalize the pressures of the cam thereon, and adjustable means for normally holding said shaft support in predetermined position and restoring it to said position when displaced thererom, said means being yieldable to permit said shaft support to swing to equalize the pressures of. the cam against the res ective ends of said brake-hand. f

igned at Detroit, Michigan, this 4th day et" December, 1924.

Herinner w. Annan. 

